Discuss 2391 exam in the Commercial Electrical Advice area at ElectriciansForums.net

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charlie

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hi, am new to forum so sorry if i'm asking same old question.
any help for the 2391 practical exam ie what happens ????
 
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TonyM58

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  • #2
Ok,

you got four tests

A Zs test box, where you measure Zs for a given CPD and see if it complies

An insualtion resistance test box where you have to establish faulty circuits

A visual assessment board, where you have to examine a CU and some circuits and find wiring faults

and finally a full PIR on a three phase installation

have fun now!!
 
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charlie

  • Thread Starter Thread Starter
  • #3
thanks for your reply.
what do you mean by "test box" ??
do you not get an installed cct to test on but just some cable ends going in to a box ???
 
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Shakey

  • Thread Starter Thread Starter
  • #4
thanks for your reply.
what do you mean by "test box" ??
do you not get an installed cct to test on but just some cable ends going in to a box ???
I am familiar with the 2391 boxes

the insualtion box you will be faced with a CU with tails coming out.

the Zs test box, you just plug into a BS1363 socket and do your tests
 
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charlie

  • Thread Starter Thread Starter
  • #5
thanks for that. any more advice on what is carried out on the rest of the practical test ??
 
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Shakey

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  • #6
The PIR is the main bit.

You have a three phase dis board feeding ring main, three phase motor outlet through a DOL contactor, and an FCU.

Then a sub single phase board with a radial socket and some one/2 way lights.

It does what it says on the tin!!! You just do a FULL Pir (no sampling) on it. Do your visuals, test and then complete the PIR.

Job done. 2 hours as i seem to rememeber.
 
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